Russian President Vladimir Putin agreed on Thursday to let European representatives take part in the next round of peace talks on Ukraine, U.S. special envoy Steve Witkoff said after he and fellow envoy Jared Kushner met with Putin at the Kremlin for four and a half hours, Politico reported.

“The Europeans will join at the next meeting, which we think is a very big deal, because it’s important, they are our partners and it’s important for them to be involved,” Witkoff told reporters, speaking alongside Kushner.

“I think progress was made,” Witkoff said, according to CNN, as reported by Meduza. “People didn’t think that we were going to restart trilateral. We’ve restarted it. We’ve set a new meeting.” He did not say when the meeting would take place.

Kushner said the discussions had been “very fulsome and detailed,” Euronews reported, citing Reuters. During the meeting, Putin cited President Donald J. Trump’s plan for a “big, beautiful agreement” that “might involve all of Europe.” “President Trump offers to agree on instruments for European security as a whole,” Putin told the envoys.

The Kremlin also set a condition. Putin aide Yuri Ushakov said the Europeans must first decide between “peace” or “war,” referring to their military support for Ukraine, Euronews reported.

The meeting followed two days of U.S.-mediated talks among American, Russian and Ukrainian delegations in Abu Dhabi, which ended with an agreement on a large prisoner exchange. From Moscow, Witkoff and Kushner flew to Dublin to brief Ukrainian President Volodymyr Zelenskyy. Witkoff said the envoys “will download Zelenskyy on everything that has occurred.”

The European Union has long pushed for a seat at the negotiating table, Politico reported. European leaders are set to discuss on Friday whether to appoint a special envoy for the peace process.